Source code of Windows XP (NT5)
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//+---------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1994.
//
// File: inv16.cxx
//
// Contents: 32->16 Call thunking
//
// History: 25-Feb-94 DrewB Created
//
//----------------------------------------------------------------------------
#include "headers.cxx"
#pragma hdrstop
#include "..\..\ole232\inc\le2int.h" // Include le2int.h before inplace.h
#include "..\..\ole232\inplace\inplace.h" // We need CFrameFilter for
// WinWord 6 Hack
//+---------------------------------------------------------------------------
//
// Function: InvokeOn16, public
//
// Synopsis: Sets up the THUNKINFO and starts thunking for a 32->16 call
//
// Arguments: [iidx] - Custom interface or known interface index
// [dwMethod] - Method index
// [pvStack32] - 32-bit stack
//
// Returns: Appropriate status code
//
// History: 25-Feb-94 DrewB Created
//
//----------------------------------------------------------------------------
#if DBG == 1
extern "C"
{
ULONG InvokeOn16_count = 0;
ULONG InvokeOn16_break = 0;
int _iInvokeOn16BreakIidx = -1;
int _iInvokeOn16BreakMethod = -1;
};
#endif
// InvokeOn16 uses a lot of local variables so allocate its locals
// rather than declaring them on the stack. This saves roughly
// 150 bytes of stack per call
struct INVOKE16RECORD
{
THOP CONST *pThop;
THOP CONST * CONST *ppThop;
UINT uiThop;
VTBLFN UNALIGNED CONST *pvfnVtbl;
VPVOID vpvThis16;
VPVOID vpvVtbl16;
VPVOID UNALIGNED CONST *pvpvThis16;
DWORD dwStack16[MAX_PARAMS];
THUNKINFO ti;
THUNK3216OBJ *ptoThis32;
ThreadData *ptd;
};
DWORD InvokeOn16(IIDIDX iidx, DWORD dwMethod, LPVOID pvStack32)
{
// NOTE: Do not declare local variables in this routine
// except for debug builds
INVOKE16RECORD *pir;
DWORD dwResult;
#if DBG == 1
ULONG ulInvokeOn16_count = ++InvokeOn16_count;
if (InvokeOn16_count == InvokeOn16_break)
{
DebugBreak();
}
thkDebugOut((DEB_ITRACE, "%sInvokeOn16(0x%x, 0x%x, %p)\n",
NestingLevelString(), iidx, dwMethod, pvStack32));
#endif
pir = (INVOKE16RECORD *)STACKALLOC32(sizeof(INVOKE16RECORD));
if (pir == NULL)
{
// This error isn't guaranteed to mean anything for
// this call. Not much else we can do, though
return (DWORD)E_OUTOFMEMORY;
}
// pvStack32 is a pointer to an array of arguments from the
// 32-bit call. It's always laid out with the first
// argument low and increasing from there
pir->ti.s32.pbStart = (BYTE *)pvStack32;
pir->ti.s32.pbCurrent = pir->ti.s32.pbStart;
pir->ti.s16.pbStart = (BYTE *)pir->dwStack16;
pir->ti.s16.pbCurrent = pir->ti.s16.pbStart;
pir->ti.scResult = S_OK;
pir->ti.fResultThunked = FALSE;
pir->ptd = TlsThkGetData();
if (pir->ptd == NULL)
{
thkDebugOut((DEB_WARN, "WARNING: InvokeOn16: Call refused\n"));
STACKFREE32(pir, sizeof(INVOKE16RECORD));
return (DWORD)E_FAIL;
}
pir->ti.pThkMgr = pir->ptd->pCThkMgr;
thkAssert(pir->ti.pThkMgr != NULL);
thkAssert(iidx < THI_COUNT);
// For each interface there is an array of thop strings, one for
// each method. The IUnknown methods don't have thop strings so
// bias the thop string pointer to account for that
thkAssert(dwMethod >= SMI_COUNT);
pir->ppThop = athopiInterfaceThopis[iidx].ppThops-SMI_COUNT;
pir->uiThop = athopiInterfaceThopis[iidx].uiSize;
// Methods are cdecl so we need to move upwards in memory to
// get to the next parameter
pir->ti.s16.iDir = 1;
// We need to look up the appropriate method pointer by
// looking in the 16-bit object's vtable
GET_STACK32(&pir->ti, pir->ptoThis32, THUNK3216OBJ *);
thkDebugOut((DEB_INVOKES,
"InvokeOn16: ptoThis32 = %08lX\n", pir->ptoThis32 ));
if ( pir->ptoThis32->grfFlags & PROXYFLAG_CLEANEDUP )
{
thkDebugOut((DEB_WARN,
"InvokeOn16: Attempt to call %s::%s"
"on cleaned-up proxy %08lX for 16-bit object %08lX\n",
inInterfaceNames[iidx].pszInterface,
inInterfaceNames[iidx].ppszMethodNames[dwMethod],
pir->ptoThis32, pir->ptoThis32->vpvThis16));
STACKFREE32(pir, sizeof(INVOKE16RECORD));
return (DWORD)E_FAIL;
}
// check PROXYFLAG_CLEANEDUP before calling DebugValidateProxy3216.
// Otherwise we might get asserts on checked OLE.
DebugValidateProxy3216(pir->ptoThis32);
pir->ti.dwCallerProxy = (DWORD)pir->ptoThis32;
pir->vpvThis16 = pir->ptoThis32->vpvThis16;
pir->pvpvThis16 = (VPVOID UNALIGNED *)
GetReadPtr16(&pir->ti, pir->vpvThis16, sizeof(VPVOID));
if (pir->pvpvThis16 == NULL)
{
dwResult = pir->ti.scResult;
STACKFREE32(pir, sizeof(INVOKE16RECORD));
return dwResult;
}
pir->vpvVtbl16 = *pir->pvpvThis16;
pir->pvfnVtbl = (VTBLFN UNALIGNED *)
GetReadPtr16(&pir->ti, pir->vpvVtbl16, sizeof(VPVOID)*pir->uiThop);
WOWRELVDMPTR(pir->vpvThis16);
if (pir->pvfnVtbl == NULL)
{
dwResult = pir->ti.scResult;
STACKFREE32(pir, sizeof(INVOKE16RECORD));
return dwResult;
}
// Push the 16-bit this pointer on the stack first
TO_STACK16(&pir->ti, pir->vpvThis16, VPVOID);
thkAssert(dwMethod < pir->uiThop);
pir->pThop = pir->ppThop[dwMethod];
thkAssert(pir->pThop != NULL);
pir->ti.pThop = pir->pThop;
pir->ti.pvfn = pir->pvfnVtbl[dwMethod];
pir->ti.iidx = iidx;
pir->ti.dwMethod = dwMethod;
pir->ti.this32 = (IUnknown *)pir->ptoThis32;
WOWRELVDMPTR(pir->vpvVtbl16);
thkDebugOut((DEB_INVOKES, "%s#(%04X):InvokeOn16 on %p:%p, %s::%s\n",
NestingLevelString(), ulInvokeOn16_count,
pir->vpvThis16, pir->ti.pvfn,
inInterfaceNames[iidx].pszInterface,
inInterfaceNames[iidx].ppszMethodNames[dwMethod]));
DebugIncrementNestingLevel();
pir->ti.pThkMgr->SetThkState(THKSTATE_INVOKETHKIN16);
#if DBG == 1
SStackRecord sr;
RecordStackState16(&sr);
#endif
#if DBG == 1
if ((_iInvokeOn16BreakIidx > 0 && _iInvokeOn16BreakIidx == (int)iidx) &&
(_iInvokeOn16BreakMethod < 0 ||
_iInvokeOn16BreakMethod == (int)dwMethod))
{
DebugBreak();
}
#endif
dwResult = EXECUTE_THOP3216(&pir->ti);
#if DBG == 1
if ( !pir->ti.fResultThunked && FAILED(dwResult) )
{
thkDebugOut((DEB_FAILURES,
"InvokeOn16 probable failure %s::%s sc = %08lX\n",
inInterfaceNames[iidx].pszInterface,
inInterfaceNames[iidx].ppszMethodNames[dwMethod],
dwResult));
if(thkInfoLevel & DEB_DBGFAIL)
thkAssert(!"Wish to Debug");
}
CheckStackState16(&sr);
#endif
pir->ti.pThkMgr->SetThkState(THKSTATE_NOCALL);
DebugDecrementNestingLevel();
thkDebugOut((DEB_INVOKES,
"%s#(%04X):InvokeOn16 on %p:%p, %s::%s returns 0x%08lX\n",
NestingLevelString(), ulInvokeOn16_count,
pir->vpvThis16, pir->ti.pvfn,
inInterfaceNames[iidx].pszInterface,
inInterfaceNames[iidx].ppszMethodNames[dwMethod],
dwResult));
STACKFREE32(pir, sizeof(INVOKE16RECORD));
return dwResult;
}
//+---------------------------------------------------------------------------
//
// Function: Call3216, private
//
// Synopsis: Sets up stack and transitions to 16-bit
//
// Arguments: [pvfn] - Function to call
// [pbStack] - Stack in 32-bits
// [cbStack] - Size of stack
//
// Returns: Appropriate status code
//
// History: 04-Mar-94 DrewB Created
//
//----------------------------------------------------------------------------
#if DBG == 1
extern "C" ULONG Call3216_count = 0;
extern "C" ULONG Call3216_break = 0;
#endif
DWORD Call3216(VPVOID pvfn, BYTE *pbStack, UINT cbStack)
{
#if DBG == 1
ULONG ulCall3216_count = ++Call3216_count;
if (Call3216_count == Call3216_break)
{
DebugBreak();
}
#endif
VPVOID vpvStack16;
DWORD dwResult;
void *pvStack16;
dwResult = (DWORD)S_OK;
if (cbStack <= WCB16_MAX_CBARGS)
{
thkDebugOut((DEB_ITRACE, "%sCallbackTo16Ex(%p, %lu, %p) #(%x)\n",
NestingLevelString(), pvfn, cbStack, pbStack,
ulCall3216_count));
// pbStack must have at least WCB16_MAX_CBARGS bytes of valid memory
// since 16V always copies that many bytes
// In our case pbStack is from InvokeOn16 which should be large enough
thkAssert(MAX_PARAMS*sizeof(DWORD) >= WCB16_MAX_CBARGS);
if (!CallbackTo16Ex(pvfn, WCB16_CDECL, cbStack, pbStack,
&dwResult))
{
dwResult = (DWORD)E_UNEXPECTED;
}
}
else
{
CALLDATA UNALIGNED *pcd;
UINT cbAlloc;
cbAlloc = cbStack+sizeof(CALLDATA);
vpvStack16 = STACKALLOC16(cbAlloc);
if (vpvStack16 == 0)
{
dwResult = (DWORD)E_OUTOFMEMORY;
}
else
{
pvStack16 = (void *)WOWFIXVDMPTR(vpvStack16, cbAlloc);
pcd = (CALLDATA UNALIGNED *)((BYTE *)pvStack16+cbStack);
pcd->vpfn = (DWORD)pvfn;
pcd->vpvStack16 = vpvStack16;
pcd->cbStack = cbStack;
memcpy(pvStack16, pbStack, cbStack);
WOWRELVDMPTR(vpvStack16);
thkDebugOut((DEB_ITRACE, "%sCallbackTo16(%p, (%p, %p, %lu)) #(%x)\n",
NestingLevelString(), gdata16Data.fnCallStub16, pvfn,
vpvStack16, cbStack, ulCall3216_count));
dwResult = CallbackTo16(gdata16Data.fnCallStub16,
vpvStack16+cbStack);
STACKFREE16(vpvStack16, cbAlloc);
}
}
return dwResult;
}
//+---------------------------------------------------------------------------
//
// Function: ThunkCall3216, public
//
// Synopsis: Sets up the 16-bit stack and makes a 32->16 call
//
// Arguments: [pti] - Thunk state info
//
// Returns: Appropriate status code
//
// History: 25-Feb-94 DrewB Created
// 08-Aug-94 AlexT Add IOleClientSite::OnShowWindow code
//
//----------------------------------------------------------------------------
#if DBG == 1
extern "C" ULONG ThunkCall3216_count = 0;
extern "C" ULONG ThunkCall3216_break = 0;
#endif
DWORD ThunkCall3216(THUNKINFO *pti)
{
DWORD dwReturn;
UINT cbStack;
DWORD dwCallerTID;
HRESULT hrCaller;
BOOL fFail = FALSE;
#if DBG == 1
ULONG ulThunkCall3216_count = ++ThunkCall3216_count;
thkAssert( (ThunkCall3216_count != ThunkCall3216_break) &&
"Break Count Hit");
#endif
thkAssert(*pti->pThop == THOP_END);
pti->pThop++;
thkAssert(*pti->pThop == THOP_ROUTINEINDEX);
pti->pThop++;
thkDebugOut((DEB_ITRACE, "%sIn ThunkCall3216 #(%x) %p, index %d\n",
NestingLevelString(), ulThunkCall3216_count,
pti->pvfn, *pti->pThop));
DebugIncrementNestingLevel();
cbStack = (ULONG) (pti->s16.pbCurrent-pti->s16.pbStart);
// The this pointer should always be on the stack
thkAssert(cbStack >= sizeof(VPVOID));
//
// Hacks for specific interface member functions.
// The placement of these hacks here is by no means an optimal solution.
// It just happens to be convienient for now since everything goes through
// here. This section is for pre-processing.
//
if ( IIDIDX_IS_INDEX(pti->iidx) )
{
switch( IIDIDX_INDEX(pti->iidx) )
{
case THI_IOleClientSite:
#define METHOD_ONSHOWWINDOW 7
if ( pti->dwMethod == METHOD_ONSHOWWINDOW )
{
//
// Here we merge the input queues for the sole reason so that
// we can link the object's window activations into the calling
// thread's window z-order.
//
hrCaller = CoGetCallerTID( &dwCallerTID );
if ( hrCaller == S_FALSE )
{
AttachThreadInput( dwCallerTID, GetCurrentThreadId(),
TRUE );
}
}
break;
case THI_IOleObject:
#define METHOD_DOVERB 11
if ( pti->dwMethod == METHOD_DOVERB )
{
//
// Here we merge the input queues for the sole reason so
// that we can link the object's window activations into
// the calling thread's window z-order.
//
hrCaller = CoGetCallerTID( &dwCallerTID );
if ( hrCaller == S_FALSE )
{
AttachThreadInput( dwCallerTID, GetCurrentThreadId(),
TRUE );
}
}
break;
case THI_IRpcStubBuffer:
#define METHOD_DEBUGSERVER_QUERYINTERFACE 8
#define METHOD_DEBUGSERVER_RELEASE 9
if(pti->dwMethod == METHOD_DEBUGSERVER_QUERYINTERFACE)
{
// This is badly designed method in the sense that
// we do not know how to thunk the OUT interface
// parameter returned by this method. The interface
// may have been addrefed and may be not. We also do
// not know the IID of the interface. At best, we can
// thunk it as an IUnknown and not call release on the
// actual interface when building it. We can then release
// the proxy built above when DebugServerRelease is called
// later. But, it will lead to an AV if the invoker of this
// method invokes a non-IUnknown method on the thunked
// interface. In view of the above, I am failing the call
// to this method. This is a more desirable behavior and
// Wx86 thunking also would not get affected by it.
// GopalK Aug 18, 97.
thkDebugOut((DEB_FAILURES, "Call on IRpcStubBuffer::DebugServerQueryInterface\n"));
dwReturn = E_NOINTERFACE;
fFail = TRUE;
}
else if(pti->dwMethod == METHOD_DEBUGSERVER_RELEASE)
{
// See comment for DebugServerQueryInterface
thkAssert(!"Call on IRpcStubBuffer::DebugServerRelease");
thkDebugOut((DEB_ERROR, "Call on IRpcStubBuffer::DebugServerRelease\n"));
dwReturn = S_OK;
fFail = TRUE;
}
default:
break;
}
}
if(!fFail)
{
pti->pThkMgr->SetThkState(THKSTATE_NOCALL);
dwReturn = Call3216((VPVOID)pti->pvfn, pti->s16.pbStart, cbStack);
pti->pThkMgr->SetThkState(THKSTATE_INVOKETHKOUT16);
//
// Hacks for specific interface member functions.
// Again, the placement of these is by no means an optimal solution.
// They can be moved as long as they have the same effect for just these
// interfaces. This section is for post-processing.
//
if ( IIDIDX_IS_INDEX(pti->iidx) )
{
switch( IIDIDX_INDEX(pti->iidx) )
{
case THI_IOleClientSite:
if ( pti->dwMethod == METHOD_ONSHOWWINDOW )
{
//
// Unmerge the input queues afterward.
//
if ( hrCaller == S_FALSE )
{
AttachThreadInput( dwCallerTID, GetCurrentThreadId(),
FALSE );
}
}
break;
case THI_IOleObject:
if ( pti->dwMethod == METHOD_DOVERB )
{
//
// Unmerge the input queues afterward.
//
if ( hrCaller == S_FALSE )
{
AttachThreadInput( dwCallerTID, GetCurrentThreadId(),
FALSE );
}
}
#define METHOD_GETCLIENTSITE 4
if ( pti->dwMethod == METHOD_GETCLIENTSITE )
{
//
// Excel 5.0a needs to perform some special processing
// on the way out of a IOleObject::GetClientSite call.
// See CTHKMGR.CXX and APINOT.CXX for more details.
//
if ( TlsThkGetAppCompatFlags() & OACF_CLIENTSITE_REF )
{
//
// Tell the thkmgr that we are thunking a bad
// IOleObject::GetClientSite reference on the way out.
//
thkDebugOut((DEB_WARN,"TC3216: OACF_CLIENTSITE_REF used: "
"Setting to clientsite thunk state\n"));
pti->pThkMgr->SetThkState(
THKSTATE_INVOKETHKOUT16_CLIENTSITE);
}
}
break;
case THI_IOleInPlaceFrame:
#define METHOD_REMOVEMENUS 11
//
// Winword 6.0a didn't call OleSetMenuDescriptor(NULL)
// during its IOleInPlaceFrame::RemoveMenus. This leaves
// OLE's frame filter in place. The frame filter holds references
// to some objects so everybody's refcounting gets thrown off
// Here, when we see a RemoveMenus call completing we force
// the OleSetMenuDescriptor(NULL) call to occur. This shuts
// down the frame filter and corrects the reference counts.
//
// There is one other hack necessary: Word unsubclasses the
// window itself directly rather than going through
// OleSetMenuDescriptor. Therefore the frame filter code
// is patched to only unhook if it detects that it is the
// current hook
//
// See APINOT.CXX for more hack code.
//
if (pti->dwMethod == METHOD_REMOVEMENUS)
{
if ( TlsThkGetAppCompatFlags() & OACF_RESETMENU )
{
HRESULT hr;
HWND hwnd;
LPOLEINPLACEFRAME lpoipf;
pti->pThkMgr->SetThkState(THKSTATE_NOCALL);
lpoipf = (LPOLEINPLACEFRAME)pti->this32;
hr = lpoipf->GetWindow( &hwnd );
pti->pThkMgr->SetThkState(THKSTATE_INVOKETHKOUT16);
if ( FAILED(hr) )
{
break;
}
thkDebugOut((DEB_WARN,
"TC3216: OACF_RESETMENU used: "
"Setting menu descriptor "
"to NULL on %p\n", hwnd));
OleSetMenuDescriptor(NULL, hwnd, NULL, NULL, NULL);
}
}
break;
default:
break;
}
}
if ( !pti->fResultThunked )
{
dwReturn = TransformHRESULT_1632( dwReturn );
#if DBG == 1
if (FAILED(dwReturn) )
{
thkDebugOut((DEB_FAILURES,
"Call3216 pvfn = %08lX Probably failed hr = %08lX\n",
pti->pvfn, dwReturn));
if(thkInfoLevel & DEB_DBGFAIL)
thkAssert(!"Wish to Debug");
}
#endif
}
}
DebugDecrementNestingLevel();
thkDebugOut((DEB_ITRACE, "%sOut ThunkCall3216 #(%x) returns 0x%08lX\n",
NestingLevelString(), ulThunkCall3216_count, dwReturn));
return dwReturn;
}
//+---------------------------------------------------------------------------
//
// Function: SetOwnerPublicHMEM16, public
//
// Synopsis: Changes the 16-bit memory handle into a public selector, owned
// by nobody. This prevents any app from taking it away when it
// is cleaned up.
//
// Arguments: [hmem] - 16-bit memory handle
//
// Returns: Appropriate status code
//
// History: 13-Jul-94 BobDay Created it
//
//----------------------------------------------------------------------------
void SetOwnerPublicHMEM16( DWORD hmem )
{
CallbackTo16(gdata16Data.fnSetOwnerPublic16, hmem );
}